Think of transpilers like GWT, where you write java that's converted to in-browser Javascript; or the current trend of server-side Javascript.

(For what it's worth, both are really really cool technologies!)

Edit: But I also suspect this relates to a temptation to write browser-side Javascript without thinking about the server-side or database; IE, browser-side Javascript that just loads objects willy-nilly via fetch / AJAX and creating lots of round trips.